. Handbook of nature-study for teachers and parents, based on the Cornell nature-study leaflets. Nature study. 170 Handbook of Nature-Study eggs and then swims off unconcernedly. Again he enters the nest and drops more milt upon the eggs and then fares forth again, a still energetic wooer. If there was ever a justified polygamist, he is one, since it is only the cares and responsibilities of the home that he desires. He only stops wooing when his nest holds as many eggs as hs feels equal to caring for. He now stands on guard by the door, and with his winnowing pectoral fins, sets up a current
. Handbook of nature-study for teachers and parents, based on the Cornell nature-study leaflets. Nature study. 170 Handbook of Nature-Study eggs and then swims off unconcernedly. Again he enters the nest and drops more milt upon the eggs and then fares forth again, a still energetic wooer. If there was ever a justified polygamist, he is one, since it is only the cares and responsibilities of the home that he desires. He only stops wooing when his nest holds as many eggs as hs feels equal to caring for. He now stands on guard by the door, and with his winnowing pectoral fins, sets up a current of water over the eggs; he drives off all intruders with the most vicious attacks, and keeps off many an enemy simply by a display of reckless fury; thus he stands guard until the eggs hatch and the tiny little sticklebacks come out of the nest and float off, attaching themselves by their mouths to the pond weeds until they become strong enough to scurry around in the water. Some species arrange two doors in this spherical nest so that a current of water can flow through and over the eggs. Mr. Eugene Bark- er, who has made a special study of the little five- spined sticklebacks of the Cayuga Basin, has failed to find more than one door to their nests. Mr. Barker made a most interesting ob- servation on this stickle- back's obsession for father- hood. He placed in the aquarium two nests, one of which was guarded by its loyal builder, which allowed himself to be caught rather than desert his post; the little guardian soon dis- covered the unprotected nest and began to move the eggs from it to his own, carrying them carefully in his mouth. This addition made his own nest so full that the eggs persistently crowded out of the door, and he spent much of his time nudging them back with his snout. We saw this stickleback fill his mouth with algas from the bottom of the aquarium, and holding himself steady a short distance away, apparent- ly blow the algae at the nest from a distance of
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